This new update offers players a new group-combat experience as they band together to try and defeat this threat again. Victory, however, is far from assured, and failure is a very real option. So to help increase your odds, devs offer the following combat walk-through video from PAX Prime that might just have enough hints to help you hone your tactics. You can also join the devs for a livestream on Friday the 20th at 3:00 p.m. EDT on the official GW2 Twitch channel.
[Source: ArenaNet press release]